Trap for drains and the like



Patented Sept. 8, 1925.

UNITED STATES PATENT OFFICE. '4

TRAP FOR BRAINS AND THE LIKE.

Applica ion elm gust 5, 1924. Serial no. 730,202.

. To all whom it may concern.

Be it known that I, CHESTER M. SYLVES- TER, a citizen of the UnitedStates of America, and resident of Middleboro, in the county of Plymouthand State of Massachusetts, have invented new and useful Improvements inTraps for Drains and the'like, of which the following is aspecification.

This invention pertains to drain traps and more particularly toself-venting traps capable of maintaining an adequate Water seal evenwhen subjected topowerful siphonic action, a trap of this general typebeing'disclosed in my'Patent No. 1,455,279 dated May 15, 1923.

Principal objects of the present inventlon are to provide a trap of theaforesaid type but of imp'rovedconstruction and in particular toprovideatrap capable in an even more certain manner of maintaining its waterseal when exposed to siphonic action such as produced by a large head ofWater dropping past the trap through the maximum distance'met inpractice;'to provide a trap in which the water is caused to circulatewith a swirling motion whereby through its scouring action to preventthe deposit of sediment or filth upon the interior walls of the trap; toprovide a trap whose several chambers are all readily accessible througha single clean-out opening; to provide a trap so designed that even asmall quantity of air is sufficient to breakthe siphonic action almostinstantaneously; and to devise a trap of such external shape thatleakage from the inlet to thevent chamber cannot take place.

In the accompanying drawing one pre-, ferred embodiment of the inventionis illustrated by way of example,

Fig. 1 being-a vertical section through the improved trap illustratingthe various chambers and passages the'rein;.and

Fig. 2 being a horizontal section on the line 22. of Fig. 1. I

Referring to the drawings-the numeral 1 indicates a casing of anysuitable convenient external form, preferably having one, of its sidewalls curved to=a circular arc, asindicated at 2. The opposite wall 3.of the, casing may be curved or not as,desired,--bein'g here shown assubstantially flat; r i

The trap also comprises a tube or pipe 4 extending verticallydownwardsubstantially parallel of the Wall 3 of the casing 1 and spaced from thelatter. The lower end of the pipe or tube 4 is curved at 5 and united tothe Wall 3 of the casing, the interior of the tube 4 constituting aninlet passage or chamber 6.

/ The interior of the casing 1 is divided by means of a verticalpartition 7 which extends upwardly from the plane of the lower wall 8 ofthe casing, being provided at its lower edge with a seat member 9 lyingsub-- stantially in the plane of the bottom 8 of the casing, the purposeof such seat member being hereinafter described.

The division wall 7 separates a vent chamber 10 from an outlet chamber11, the inlet passage 6 communicating freely'with the vent chamber atthe point 6 Preferably the relative dimensions of the chambers 6, 10 and11 are substantially such as described in my afore-mentione-d patent,such chambers being vetically elongate and substantially parallel toeach other.

The upper part of the casing 11 is preferably provided with a lateraloffset 12 of circular section providing a discharge passage 11*, theofiset being screw threaded either externally or internally at 13 forattachment to a pipe coupling. ".The upper end of the tube 4 maylikewise be threaded for connection-to a pipe or may be secured to suchpipe.

by means of solder or other attaching means.

The vent chamber 10 communicates by means of a downwardly curvedpassagelil'4 at its upper end with the outlet chamber 11.

The upper wall of the passage 14 is formed by a downwardly curved hood15 which terminates at 16 at a level substantially below the bottom ofthe discharge passage 11 of the outlet chamber 11. The casingisfprovided at one side near its lower part with a lateral ofi'set'18.This ofiset is hollow, providing a fluid-passage 19 which opens at 20into the vent chamber 10 and at 2O into the "lower part of the outletchamber 11. J As indicated in Fig. 1 the upper wall of the passage 19inclines downwardly so that the opening 20* is restricted as comparedwiththe opening 20. The passage 19 is so curved laterally that fluidpassing therethrough is substantially reversed in its direction of flowand enters the chamber with a downwardly'projecting annularboss 21defining a clean-out opening so positioned that the lower edge of thepartition 7 forfns a chord of the circular o ening.

The boss 21 is here shown as internally screw-threaded for, thereception of a emovable cap 22 although the cap or other form of closuremay be removahly. seeured in place in any other desired manner. A gasket23 is preferably associated Withthe cap 22 and is held by the latteragainst an annular seat 24 formed at the inner part (it-the opening, thecover comprising the-capand gasket are in place the latter also seatsagainst the seat member" 9;o-f the partition 7 so as completely to closeco'mmu'nic ation between the chambers 10 and 11 below the partition;

-Upon removal: oi? the cover the outlet chamber? '11 becomes: accessiblethrough the a r-t 25 of the opening while the aha-mixers 10andffialsoare accessible three hthe part 26 of the opening. Itis-thus-pos'sible to clean out all three chambers through the one cleanfduti'ope'ning, although two of the chamber-s2 at least ar'e' normallysealed from eac'hiothenat the -opefiingg. 4 v

E-1i.:opera-tion a water-' se'a-lis norinally maintained in theltrap :ata height at least upstotheltopvlfi .df th'e pa'ssage 6. Whentlie: :trap:is' subjectedto a powerful s'iphon'ic action due to theiditopping oflarge head ofivater :p'astgthe discharge passage 11 thewateiuinttlie'iirap isisucked-=upwandly both of itheroh'amb'ers 10 and11; This upwardnioiiemntiofrthe water in-the trapeontin-iies until-theWater :level theinlet'clia'rnbr 6' dropsitera point. below the p int17-. The airwhichnow enters at the tapof the pas; sage- 6'; immediatelyrises'iii thevent chainberi IOan'd escapesibeneath' the edge 16 into therelative narrow part of the upper easing 1'1, Wherei'it becomes"instantaneously av'm ilable to break :theivaciiunt in"tl1e casing; Asthe top. 17015 the assage G issIighHy highef than" the 1 top ofpassage220% all airentering beneath .the. vent :ch'a-mber tends strongly tomove hip fwardly imhe latter chamber-so that ven a slight'quantity ofair i's thus available to break the seal. i i rMoreov'feit; asapoiiitedout i1i my-ipriorpateiit, the; downward disehargeiiozt the air andWater. from hamber: l0? aets in a; positive fifannr. to: arrest thaniafrd movemehti :ef the: water." i the; outletrieh'ainbei 1 F et th at aver iefiee'tiverfmeairsi: is provided; fon+hrea1s ingxva'i-itnnandipreventing eriiptying' or fih ifirapa -.4 i. a eflidint fi-irsei-of-; thei air results in a greatly improved-I ioperatibni of. the trap:a'n'di efiefni when su'bj efcteda tozthe most rig-id. tests thelt-rap:maintains avwaterseal of"adeq uate During the nominal ;oper'ation?dfzthet'rap, when the fluid? flows itliroiigh the p'as'sag el 6" outthrough open-mg and through the passage-19 inter the chamber -'1 '1,-:itzefiteritlie letter at its lower part in a path substantiallytangent to' the inner surface of the wall 2; This creates a horizontalswirl or eddy which-effectually seours the inner surface of the casingand thus removes any deposit .whieh'maytend to accumulate thereon. Asthe fluid must first pass up in the vent chamber 1 0 then move outlaterally chamber lo eueh as might occur through; a

defective easting wereth'e'wa'lrof the pipe 4:

coincident with the wall 3- ofthe casin A1- theugh -the=spaeing oftheparts 3and eas heifeinshown is desirab1e this is regarded as a minorfeature of the invention; as the pas sage 6 may as in my prior patentbefor'med' Y in an integral part of the casing 1 if de's'ired k v n vWhile buta single "o ffsetim'ember l8w vith it's-passage '19isjheredisolosed it"is contemplated that *untlerleertain circumstancesthe easihg in'ightbe prdvi-ded with' afsimilarofi set and a. passage at.its oppositewsides, 'a'l ti'iough the single passage ihe'rei-n disclosedis ordinarily adequate and'eufiieient for' the in'- tended purpose. i.

'M'aiiifestly changes'iin thei'external. shape and dimensionsof the-trapinayj b'e'made as occasion may warrant or i experiencemay c lirectwithout departing from the 'spirit of the-invention -1:.: Aiftfi-pcomprising a casing having a vent eliainberiand anoutletch aniber therein,-. .antl 'an" inlet" tubespaced from and substantiall parallel 'wit hthe outer wall of the vent chamben said tube bei'ng connected to thelower part ofthe casing, the interiorof the tuhe constituting inletehamberand communicating with the lower"- part of the vent chamber. V vI BRA. trap comprising apasing havihg a xzent chambei and. tin-outletchamber, and passage conneeting-said chambers; said p e s" sage beingeonstriicteeiaihct a ra'ngefl to d liver fluid with a swirling motioninto the outiet ehamber. M p a A "trap eommising a casin having "a vent;chamber -'arid' air outlet ehaihher, said chambers eenahunieating atthefir "upper partsaiid; ihean's fdr pr'edueiiig an edey'i'n foremanating fliiid' the were her and for delivering such fluid into theoutlet chamber in a direction substantially tangent to the curved wallof the latter.

5. A trap comprising a casing having a vent chamber and an outletchamber, a passage connecting said chambers, said passage leadinglaterally from the lower part of the vent chamber and delivering thefluid into the outlet chamber in a direction substantially opposite tothe direction of its flow from the vent chamber.

6. A trap having an inlet chamber, a vent chamber and an outlet chamber,the inlet chamber communicating by means of an opening with the lowerpart of the vent chamber, and a passage leading from the vent chamber tothe lower part of the outlet chamber, the top of the delivery end ofsaid passage being below the top of the opening connecting the inletchamber with the vent chamber.

7 A trap having an inlet chamber, a vent chamber and an outlet chamber,an opening between the inlet chamber and the lower part of the ventchamber, and a pas sage having a downwardly inclined upper Wall leadingfrom the vent chamber to the lower part of the outlet chamber.

8. A trap comprising a casing having a vent chamber and an outletchamber, said casing having a lateral oilset near its bottom, and acurved passage extending from the vent chamber through said lateraloffset and opening into the lower part of the outlet chamber. 7

9. A trap comprising a casing, a vertical partition extending upwardlyfrom the bottom of the casing, said partition separating a vent chamberfrom an outlet chamber, and a curved passage leading from the ventchamber and entering the side of the outlet chamber near the bottom ofthe latter.

10. A trap having an inlet-chamber, a

vent chamber and an outlet chamber, an

opening connecting the vent and outlet chambers at their upper ends, andpassages connecting the lower parts of the inlet and leading from thevent chamber to the lower part of the outlet chamber.

12. A trap having an inlet chamber, a vent chamber and an outletchamber, the latter chambers being connected by an opening near theirupper ends, a passage connecting the inlet chamber with the lower partof the vent chamber, and a passage connecting the vent chamber with thelower part of the outlet chamber, the parts being so constructed andarranged as to tend to prevent the direct flow of air from the inletchamber into the outlet chamber except through the opening connectingthe latter with the upper part of the vent chamber.

13. A trap having an inlet chamber, a vent chamber and an outletchamber, said chambers being vertically elongate and substantiallyparallel, a passage connecting the inlet and vent chambers, and meansconstraining fluid flowing from the vent to the outlet chambers to movein a curved path.

14. A trap comprising a casing divided by a vertical partition to formvent and outlet chambers, a passage connecting the venit chamber withthe lower part of the outlet chamber, a discharge passage leading fromthe outlet chamber near its top, and a passage connecting the ventchamber with the upper part of the outlet chamber, said passageterminating in a down turned portion having its lower end below thelevel of the discharge passage.

Signed by me at Middleboro, Massachusetts', this tenth day of July,1924.

CHESTER M. SYLVESTER'.

